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Check if you can re-edit and re-save the instructions: Try to re-enter your instructions carefully and save again, ensuring the save completes without errors.
Test the agent’s behavior: Even if instructions appear missing, test if the agent still performs as expected.
Backup your instructions externally: Keep a copy of your instructions outside Copilot Studio (e.g., in a document) so you can reapply them if needed (from now one).
Look for updates: Microsoft may release updates or fixes addressing this behavior, so keep your environment updated.
Microsoft Support: If instructions disappear repeatedly or unexpectedly, report the issue to Microsoft Support for investigation and potential fixes. This will increase the number of users faces the issue and it will become in pririty.
Hi @HC-16040112-0,
Unfortunately, there is currently no guaranteed way to recover disappeared Instructions in Copilot Studio once they are removed.
Possible reasons: • The save operation may not have completed successfully • The “Describe” feature may have overwritten existing instructions • A temporary Copilot Studio glitch/UI issue occurred • Sometimes Copilot Studio randomly removes instructions or variables due to known platform instability
Things you can try: • Re-open the agent and check again in another browser or Incognito mode • Re-enter the instructions and save carefully • Make sure all available Save buttons were clicked (details + instructions) • Test the agent behavior to verify whether the old instructions are still partially applied
Recommendations: • Always keep a backup of Instructions externally (.docx, OneNote, Notepad, etc.) • If this happens repeatedly, raise a Microsoft Support ticket so the issue gains visibility and priority
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